CN115960515B - Weather-resistant powder coating and preparation method thereof - Google Patents
Weather-resistant powder coating and preparation method thereof Download PDFInfo
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- CN115960515B CN115960515B CN202211709861.8A CN202211709861A CN115960515B CN 115960515 B CN115960515 B CN 115960515B CN 202211709861 A CN202211709861 A CN 202211709861A CN 115960515 B CN115960515 B CN 115960515B
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- 238000000576 coating method Methods 0.000 title claims abstract description 50
- 239000011248 coating agent Substances 0.000 title claims abstract description 46
- 239000000843 powder Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000003381 stabilizer Substances 0.000 claims abstract description 13
- 229920001225 polyester resin Polymers 0.000 claims abstract description 12
- 239000004645 polyester resin Substances 0.000 claims abstract description 12
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 10
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 9
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims abstract description 9
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 23
- 238000012216 screening Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910021389 graphene Inorganic materials 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical group C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000011258 core-shell material Substances 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- -1 acrylic ester Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The invention discloses a weather-resistant powder coating and a preparation method thereof, wherein the weather-resistant powder coating is used for metal surface treatment and comprises modified resin, oxide, triglycidyl isocyanurate, a binder, a leveling agent, barium sulfate, silica micropowder, a stabilizer and a filler. According to the preparation method, the oxide is mixed with the binder and then mixed with other components, a core-shell structure can be formed, the oxide is wrapped in a system formed by the other components, when the oxide is applied to the metal surface, the weather resistance of a formed coating can be improved, the modified resin is obtained by mixing epoxy resin, acrylic resin and carboxyl-terminated polyester resin according to a proportion, the mechanical property of the powder coating can be guaranteed, the powder coating has good stability and heat resistance, and the powder coating is also beneficial to storage.
Description
Technical Field
The invention relates to the field of preparation of powder coatings, in particular to a weather-resistant powder coating and a preparation method thereof.
Background
The metal corrosion not only brings economic loss to human beings, but also is unfavorable for protecting natural resources and environment and sometimes endangers personal safety. In order to prevent and slow corrosion, a number of corrosion protection methods have been developed in production practice and scientific experiments. Among them, the most convenient and economical protection with paint is achieved, so that the paint has wide application. The powder coating is a solid powder synthetic resin coating composed of solid resin, pigment, auxiliary agent and the like, and is used as fine powder, and when the powder coating is applied to the coating field, the powder coating has the problems of low tolerance in severe environment, poor weather resistance and easy damage of a coating film.
Disclosure of Invention
Based on the weather-resistant powder coating and the preparation method thereof, the invention provides the weather-resistant powder coating and the preparation method thereof, and the specific technical scheme is as follows:
a weather resistant powder coating for metal surface treatment, comprising the following preparation raw materials in parts by weight:
65 to 80 parts of modified resin, 7 to 12 parts of oxide, 1 to 5 parts of triglycidyl isocyanurate, 1 to 7 parts of binder, 3 to 7 parts of flatting agent, 1 to 3 parts of barium sulfate, 1 to 3 parts of silica micropowder, 0.1 to 0.5 part of stabilizer and 1 to 7 parts of filler;
wherein the modified resin is epoxy resin, acrylic resin and carboxyl-terminated polyester resin according to the mass ratio of 1-3: 1 to 5: 1-3, and modifying by graphene.
Further, the graphene includes a vinyl pyrrolidone group.
Further, the oxide is aluminum oxide, silicon oxide and zinc oxide according to the mass ratio of 1-5: 3 to 7:1 to 5.
Further, the binder is a polyester resin.
Further, the leveling agent is acrylic ester.
Further, the stabilizer is organotin.
Further, the particle size of the oxide is 25 μm ～30 μm 。
In addition, the application also provides a preparation method of the weather-resistant powder coating, which comprises the following steps:
uniformly mixing the oxide with a binder to obtain a mixture A;
uniformly mixing the modified resin, triglycidyl isocyanurate, barium sulfate, silica micropowder, a stabilizer and a filler, stirring at 95-150 ℃ for 1-3 h, adding a leveling agent, and continuously stirring for 10-20 min to obtain a mixture B;
and (3) carrying out melt extrusion on the mixture B, then carrying out multistage vibration screening, adding the mixture A, continuing stirring at a speed of 800-1500 r/min for 20-40 min, reducing the stirring speed to 200-500 r/min, and carrying out crushing treatment and screening treatment to obtain the weather-resistant powder coating.
Further, the first region of the melt extrusion temperature is 100 ℃, and the second region is 110 ℃.
According to the scheme, the oxide is mixed with the binder and then mixed with other components to form a core-shell structure, the oxide is wrapped in a system formed by the other components, and when the oxide is applied to the metal surface, the weather resistance of a formed coating can be improved, and the modified resin is obtained by mixing epoxy resin, acrylic resin and carboxyl-terminated polyester resin according to a proportion and then modifying, so that the mechanical property of the powder coating can be guaranteed, the powder coating has good stability and heat resistance, and the powder coating is also beneficial to storage.
Detailed Description
The present invention will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The weather-resistant powder coating is used for metal surface treatment, and comprises the following preparation raw materials in parts by weight:
65 to 80 parts of modified resin, 7 to 12 parts of oxide, 1 to 5 parts of triglycidyl isocyanurate, 1 to 7 parts of binder, 3 to 7 parts of flatting agent, 1 to 3 parts of barium sulfate, 1 to 3 parts of silica micropowder, 0.1 to 0.5 part of stabilizer and 1 to 7 parts of filler;
wherein the modified resin is epoxy resin, acrylic resin and carboxyl-terminated polyester resin according to the mass ratio of 1-3: 1 to 5: 1-3, and modifying by graphene.
In one embodiment, the addition amount of the graphene accounts for 15% -20% of the total mass of the modified resin.
In one embodiment, the graphene comprises a vinyl pyrrolidone group.
In one embodiment, the oxide is aluminum oxide, silicon oxide and zinc oxide according to the mass ratio of 1-5: 3 to 7:1 to 5.
In one embodiment, the binder is a polyester resin.
In one embodiment, the leveling agent is an acrylate.
In one embodiment, the stabilizer is an organotin.
In one embodiment, the oxide has a particle size of 25 μm ～30 μm 。
In addition, the application also provides a preparation method of the weather-resistant powder coating, which comprises the following steps:
uniformly mixing the oxide with a binder to obtain a mixture A;
uniformly mixing the modified resin, triglycidyl isocyanurate, barium sulfate, silica micropowder, a stabilizer and a filler, stirring at 95-150 ℃ for 1-3 h, adding a leveling agent, and continuously stirring for 10-20 min to obtain a mixture B;
and (3) carrying out melt extrusion on the mixture B, then carrying out multistage vibration screening, adding the mixture A, continuing stirring at a speed of 800-1500 r/min for 20-40 min, reducing the stirring speed to 200-500 r/min, and carrying out crushing treatment and screening treatment to obtain the weather-resistant powder coating.
In one embodiment, the melt extrusion temperature is 100℃in the first zone and 110℃in the second zone.
According to the scheme, the oxide is mixed with the binder and then mixed with other components to form a core-shell structure, the oxide is wrapped in a system formed by the other components, and when the oxide is applied to the metal surface, the weather resistance of a formed coating can be improved, and the modified resin is obtained by mixing epoxy resin, acrylic resin and carboxyl-terminated polyester resin according to a proportion and then modifying, so that the mechanical property of the powder coating can be guaranteed, the powder coating has good stability and heat resistance, and the powder coating is also beneficial to storage.
Embodiments of the present invention will be described in detail below with reference to specific examples.
Examples 1 to 3 and comparative examples 1 to 5:
the preparation raw materials and proportions of examples 1 to 3 and comparative examples 1 to 5 are shown in Table 1, and the preparation methods are as follows:
a preparation method of weather-resistant powder coating comprises the following steps:
uniformly mixing the oxide with a binder to obtain a mixture A;
mixing epoxy resin, acrylic resin and carboxyl-terminated polyester resin, adding graphene accounting for 10-20% of the total mass, and modifying the graphene to obtain modified resin;
uniformly mixing the modified resin, triglycidyl isocyanurate, barium sulfate, silica micropowder, a stabilizer and a filler, stirring at 125 ℃ for 2 hours, adding a leveling agent, and continuously stirring for 20 minutes to obtain a mixture B;
and (3) carrying out melt extrusion on the mixture B, then carrying out multistage vibration screening, adding the mixture A, continuing stirring at a speed of 1500r/min for 30min, reducing the stirring speed to 200r/min, and carrying out crushing treatment and screening treatment to obtain the weather-resistant powder coating.
Comparative example 6:
comparative example 6 differs from example 3 in the preparation method, and the raw materials and the raw material ratios are the same as in example 3. The preparation method of comparative example 6 is as follows:
the preparation method of the powder coating comprises the following steps:
uniformly mixing the oxide with a binder to obtain a mixture A;
mixing epoxy resin, acrylic resin and carboxyl-terminated polyester resin, adding triglycidyl isocyanurate, barium sulfate, silicon micropowder, a stabilizer and a filler, uniformly mixing, stirring at 125 ℃ for 2 hours, adding a flatting agent, and continuously stirring for 20 minutes to obtain a mixture B;
and (3) carrying out melt extrusion on the mixture B, then carrying out multistage vibration screening, adding the mixture A, continuing stirring at a speed of 1500r/min for 30min, reducing the stirring speed to 200r/min, and carrying out crushing treatment and screening treatment to obtain the powder coating.
Comparative example 7:
comparative example 7 differs from example 3 in the preparation process, the raw materials and the raw material ratios are the same as in example 3, and the preparation method of comparative example 7 is as follows:
a method for preparing a powder coating, comprising the steps of:
mixing epoxy resin, acrylic resin and carboxyl-terminated polyester resin, adding graphene accounting for 10-20% of the total mass, and modifying the graphene to obtain modified resin;
uniformly mixing the modified resin, triglycidyl isocyanurate, oxide, binder, barium sulfate, silica micropowder, stabilizer and filler, stirring at 125 ℃ for 2 hours, adding a leveling agent, and continuously stirring for 20 minutes to obtain a mixture;
and (3) carrying out melt extrusion on the mixture, then carrying out multistage vibration screening, adding the mixture A, continuing stirring at the speed of 1500r/min for 30min, reducing the stirring speed to 200r/min, and carrying out crushing treatment and screening treatment to obtain the powder coating.
Table 1:
the weather-resistant powder coatings prepared in examples 1 to 3 and the powder coatings prepared in comparative examples 1 to 7 were subjected to performance test by spraying the respective powder coatings on an aluminum plate, and testing adhesion by a painting method, and referring to GB/T9286-1998, a smaller number indicates more excellent adhesion; the artificial aging test is referred to ISO11341; other test conditions and results are shown in table 2 below.
Table 2:
from the data analysis in table 2, it is known that the present application can obtain more excellent weather resistance by combining different resins and then modifying the resins, and the present community can assist in obtaining a coating layer having more excellent mechanical properties as a whole by adding an oxide to the system. In addition, the addition sequence of the raw materials in the process is different, and the method has a promoting effect on obtaining weather resistance, so that the problem of poor weather resistance of the powder coating in the prior art can be effectively solved by using the method as a complete technical scheme.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. A weather-resistant powder coating for metal surface treatment, characterized by comprising the following preparation raw materials in parts by weight:
65 to 80 parts of modified resin, 7 to 12 parts of oxide, 1 to 5 parts of triglycidyl isocyanurate, 1 to 7 parts of binder, 3 to 7 parts of flatting agent, 1 to 3 parts of barium sulfate, 1 to 3 parts of silica micropowder, 0.1 to 0.5 part of stabilizer and 1 to 7 parts of filler;
wherein the modified resin is epoxy resin, acrylic resin and carboxyl-terminated polyester resin according to the mass ratio of 1-3: 1 to 5: 1-3, and modifying graphene;
wherein the graphene comprises a vinyl pyrrolidone group;
the oxide is aluminum oxide, silicon oxide and zinc oxide according to the mass ratio of 1-5: 3 to 7:1 to 5, mixing to obtain;
weather-resistant powder coating, the preparation method comprising the following steps:
uniformly mixing the oxide with a binder to obtain a mixture A;
uniformly mixing the modified resin, triglycidyl isocyanurate, barium sulfate, silica micropowder, a stabilizer and a filler, stirring at 95-150 ℃ for 1-3 h, adding a leveling agent, and continuously stirring for 10-20 min to obtain a mixture B;
and (3) carrying out melt extrusion on the mixture B, then carrying out multistage vibration screening, adding the mixture A, continuing stirring at a speed of 800-1500 r/min for 20-40 min, reducing the stirring speed to 200-500 r/min, and carrying out crushing treatment and screening treatment to obtain the weather-resistant powder coating.
2. The weatherable powder coating of claim 1, wherein the binder is a polyester resin.
3. The weatherable powder coating according to claim 1, characterized in that the leveling agent is an acrylate.
4. The weatherable powder coating of claim 1, wherein the stabilizer is an organotin.
5. A weather resistant powder coating as claimed in claim 3, wherein the oxide has a particle size of 25 μm ～30 μm 。
6. The weatherable powder coating of claim 1, wherein the melt extrusion temperature is 100 ℃ in one zone and 110 ℃ in the second zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211709861.8A CN115960515B (en) | 2022-12-29 | 2022-12-29 | Weather-resistant powder coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211709861.8A CN115960515B (en) | 2022-12-29 | 2022-12-29 | Weather-resistant powder coating and preparation method thereof |
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| Publication Number | Publication Date |
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| CN115960515A CN115960515A (en) | 2023-04-14 |
| CN115960515B true CN115960515B (en) | 2024-02-13 |
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| CN107641429A (en) * | 2017-10-30 | 2018-01-30 | 遵义春华新材料科技有限公司 | Produce a kind of method of the powdery paints for submarine pipeline |
| CN108624199A (en) * | 2018-06-06 | 2018-10-09 | 宁波派特勒新材料股份有限公司 | A kind of Heat Resistant Powder Coatings and preparation method thereof |
| CN114106600A (en) * | 2021-12-15 | 2022-03-01 | 廊坊旭博涂立德新型材料科技有限公司 | Multifunctional ceramic powder coating taking inorganic substance as main body |
| CN114752280A (en) * | 2022-05-09 | 2022-07-15 | 广西南宁维一防腐科技有限公司 | Thermosetting powder coating |
| CN115232533A (en) * | 2022-08-19 | 2022-10-25 | 江西锐克斯科技有限公司 | Super-weather-resistant metal powder coating and preparation method thereof |
-
2022
- 2022-12-29 CN CN202211709861.8A patent/CN115960515B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107641429A (en) * | 2017-10-30 | 2018-01-30 | 遵义春华新材料科技有限公司 | Produce a kind of method of the powdery paints for submarine pipeline |
| CN108624199A (en) * | 2018-06-06 | 2018-10-09 | 宁波派特勒新材料股份有限公司 | A kind of Heat Resistant Powder Coatings and preparation method thereof |
| CN114106600A (en) * | 2021-12-15 | 2022-03-01 | 廊坊旭博涂立德新型材料科技有限公司 | Multifunctional ceramic powder coating taking inorganic substance as main body |
| CN114752280A (en) * | 2022-05-09 | 2022-07-15 | 广西南宁维一防腐科技有限公司 | Thermosetting powder coating |
| CN115232533A (en) * | 2022-08-19 | 2022-10-25 | 江西锐克斯科技有限公司 | Super-weather-resistant metal powder coating and preparation method thereof |
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